On 10/19/06, Corey Edwards <[EMAIL PROTECTED]> wrote:
That depends on what exactly MPI is. From the code I get the impression
that it's a library that handles parallel execution, in which case the
whole point is to have multiple processes fork off and remain running.
If that's the case I believe my code is correct. It could also be that
each child is supposed to run MPI_Finalize, signalling that it has
exited and should no longer be included in the process pool. Googling
around for MPI seems to indicate something along those lines.
Good point, I hadn't considered that maybe MPI_Finalize was meant to
be called for each process. If that's the case, I'd move the
MPI_Finalize call up into the if statement and keep the return. Also
correcting the if statement so that it's the *children* who execute
the block:
#include <stdio.h>
#include <mpi.h>
void main (int argc, char *argv[])
{
int myrank, size,x;
MPI_Init(&argc, &argv);
for(x = 0; x < 10; x++){
if(fork()){
/* do parent stuff */
} else {
/* do child stuff -- I assume it's
* each child that does this, rather
* than the parent doing it ten times
*/
MPI_Comm_rank(MPI_COMM_WORLD, &myrank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
printf("Processor %d of %d: Running!\n", myrank, size);
MPI_Finalize();
return;
}
}
}
Jacob Fugal
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